.main-part {
  position: relative;
  top: 9em;
  left: 21em;
  width: 70%;
}
@media screen and (max-width: 600px){
  .main-part {
    position: relative;
    top: 14em;
    left: 0em;
    width: 100%;
  }
}
@media screen and (max-width: 900px)and (min-width: 601px){
  .main-part {
    position: relative;
    top: 14em;
    left: 14em;
    width: 62%;
  }
}
